Furnace-grate



(No Model.) 2 Sheets-Sheet 2. J. A. BUSAM.

FURNACE GRATB.

No. 585,428. Patented June 29. 1897.

Wiigzsscs rrrcn.

JosEPn A. BUSAM, on TIFFIN, OHIO.

FU RNACE-G RATE.

SPECIFICATION formingpart of Letters Patent No. 585,428, dated June 29,1897. Application filed Tune 12, 1896. Serial No. 595,353. (No modeld To all whom it may concern:

Be it known that I, J osnrn A. BUSAM, a citizen of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented a new and useful Furnace Grate, of which the following is a specification.

This invention relates to grates for furnaces having an extended fuel-surface and which are designed for locomotive and other boilers.

The primary object is the provision of a grate whose bars are longer than usual and are capable of sustaining the mass of fuel,

and which will crush clinkers and obviate choking.

The improvement consists, essentially, of a grate curving longitudinally and transversely, whereby the central portion is elevated and the grate in its general construction has imparted thereto an arch form, thereby adapting it the better to sustain the weight of the fuel without sagging or bending.

For a full understanding of the merits and advantages of the invention reference is to be had to the accompanying drawings and the following description.

The improvement is susceptible of various changes in the form, proportion, and the minor details of construction without departing from the principle or sacrificing any of the advantages thereof, and to a full disclosure of the invention an adaptation thereof is shown in the accompanying drawings, in which Figure 1 is a top plan view of a grate constructed in accordance with the principles of this invention. Fig. 2 is a longitudinal section thereof. Fig. 3 is a transverse section on the line X X of Fig. 2, looking to the left. Fig. 4 is a detail view of a bar for supporting the ends of the grate-bars. Fig. 5 is a detail perspective view of a portion of a grate-bar, showing the manner of constructing the same. Fig. (3 is a detail perspective view showing the manner of joining the longitudinal and transverse bars at the corners, the parts being separated and arranged in the position which they will occupy when assembled.

Corresponding and like parts are referred to in the following description and indicated in the several views of the accompanying drawings by the same reference-characters.

The grate-rest is composed of longitudinal bars 1 and end bars 2, which are removably jointed at their ends, so as to admit of their being replaced when disabled from any cause, and these bars are supported in the masonry or casing of the furnace in any convenient way.

In order to attain the advantages of the invention, the bars comprising the grate-rest are curved in their length, whereby their top surfaces are slightly arched, and the longitudinal bars 1 are formed on their inner sides adjacent to their top edges with lugs 3, which are spaced at regular intervals apart and correspond with the position of the wings 4 of the grate-bars 5, the said lugs and wings alining so as to provide a proper support for the fuel. The end bars 2 have semicircular notches 6-in their upper edges to receive the journals 7 at the ends of the grate-bars and are provided at their extremities with crosspieces 8, which are notched in their upper sides, as shown at 9, to receive the reduced ends 10 of the bars 1, whereby the bars 1 and 2 are held in place. To prevent any looseness between the meeting ends of the bars 1 and 2, keys 11 are inserted into the notches 9 and bear against the ends 10.

The grate-bars 5 are similarly formed and curve throughout their length, corresponding to the curvature of the longitudinal bars 1, and are approximately triangular-shaped in cross-section. The wings 4 are integral with the bars and project from opposite sides thereof and are set staggering. These wings decrease in depth or width as they recede from the bars, and their top edges are straight and their lower edges curved. The side of the grate-bars adjacent to the longitudinal bars 1 is formed with a series of wings correspondin g in number and position to the lugs 3, whereas the opposite side of these gratebars has the intermediate wings removed, the wings being omitted and replaced by lugs 12, corresponding in shape to the lugs 3. The

grate-bars located between the extreme gratebars have the wings 4E and lugs 12 alternating, the wings on one side alining with and corresponding to the lugs on the opposite side, and the grate-bars are so related that the wings of one grate-bar extend into the spaces between the wings of the adjacent grate-bar and approach close to the lugs. By this arrangement provision is had for crushing clinkers when rocking the grate-bars upon their journals.

Each grate-bar is formed with a pendentarm 13, and these arms are connected in series by a bar 14, which is formed at intervals in its length with cleft lugs 15, which receive the lower ends of the arms 13 and have pivotal connection therewith by means of pins 16, which pass through registering openings in the arms 13 and the cleft portions of the lugs 15. Arod 17 operates through an opening in the front of the furnace and is connected with the bar 14, and an operating-lever 18, fulcrumed to a bracket 19, has connection with the projecting end of the rod 17, whereby upon operating'the said lever the grate-bars will be rocked, so as to relieve the bed of fire of ashes and clinkers.

By curving the grate-bars throughout their length and mounting the same in notches in the curved bars 2 the grate presents a longitudinal and transverse curved appearance and assumes an arched form, which is best adapted to sustain a superposed weight. The grate in its general construction admits of the elementary parts being removed, so as to be substituted by new ones in the event of the old ones becoming disabled from any cause. I The grate-bars will be provided in any required number, according to the size of the furnace, and may be of a length to meet the 1 conditions, the top side being grooved or chanthe front of the furnace.

position of the furnace, and the lever 18 may extend vertically or ,in any direction found most advantageous.

Having thus described the invention, what is claimed as new is Afurnace-grate having its f uel-bearin g surface sloping in all directions from a central point, and comprising a rest composed of longitudinal and end bars detachably connected at their extremities and having their upper surfaces arched longitu dinally, and grate-bars having their upper surfaces arched longitudinally to correspond to the arch or longitudinal curvature of a set of the rest-bars, and detachably mounted upon the opposite set of rest-bars, and disposed to conform to the curvature or arch thereof, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JOSEPH A. BUSAM.

Witnesses HARRY TAGGART, WVILLIAM HELLER. 

